System Not Set Yet - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3.72 System Not Set Yet

Applicable
All indoor unit models
Models
All outdoor unit models
UF
Error Code
Method of Error
On check operation, the number of indoor units in terms of transmission is not corresponding to that
Detection of indoor units that have made changes in temperature.
Error Decision
The error is determined as soon as the abnormality aforementioned is detected through checking
Conditions the system for any erroneous connection of units on the check operation.
Supposed
 Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor
Causes
 Failure to execute check operation
 Defective indoor unit PCB
 Stop valve is not opened
Troubleshooting
Part 6 Service Diagnosis
units
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Are the stop
valves opened?
YES
Is the check
operation
carried out?
YES
Is
indoor-outdoor and
outdoor-outdoor unit
transmission wiring
normal?
YES
NO
Is
indoor-outdoor
NO
and outdoor-outdoor
unit transmission
wiring normal?
NO
NO
Troubleshooting by Error Code
Open the stop valve.
YES
Replace the indoor unit PCB.
After fixing incorrect wiring,
press and hold the RETURN
(BS3) button on the outdoor
unit main PCB for 5 seconds.
∗ The unit will not run for up to
12 minutes.
Wiring check operation may
not have been carried out
successfully.
352